Udvardy Miklos, Telek Bela, Mezey Gabriella, Batar Peter, Altorjay Istvan
2nd Department of Medicine, University Health and Medical Science Centre, Debrecen University, Hungary.
Blood Coagul Fibrinolysis. 2004 Apr;15(3):265-7. doi: 10.1097/00001721-200404000-00012.
Severe, life-threatening acute upper gastrointestinal bleeding may occasionally occur in patients receiving coumarol prophylaxis for prosthetic heart valves. These patients are exposed to two potential, serious risks: bleeding due to the severe blood loss induced by excessive anticoagulant effect or as a consequence of the cessation of anticoagulation subsequent thrombotic occlusion of the valve and loss of patency. Herein a short case report is presented. The elderly male patient had a prosthetic valve in the aortic position and also suffered from two malignant diseases: chronic lymphocytic leukaemia and a more recently developed lung cancer with metastatic spread into both lungs. The patient had a major gastrointestinal bleed, leading to a sudden fall of haematocrit (0.09), and to a collapse of peripheral circulation due to too excessive a coumarol effect (International Normalized Ratio > 8). An acute left ventricular failure developed during the early period of the emergency blood transfusion, so the correction of prothrombin time by fresh-frozen plasma (due to the large volume requirement) was not feasible. The patient received 50 microg/kg intravenous bolus of NovoSeven (recombinant active factor VII) in an almost desperate situation. The International Normalized Ratio changed to 2.1 in 30 min; bleeding had stopped immediately. There was neither evidence of disseminated intravascular coagulation (in spite of the age and underlying diseases) nor loss of valve patency or infective endocarditis during follow-up. This modest report may call attention to the potential use of recombinant active factor VII in the coumarol-induced severe bleeding episodes of prosthetic heart valve patients.
在接受香豆素类药物预防人工心脏瓣膜血栓形成的患者中,偶尔会发生严重的、危及生命的急性上消化道出血。这些患者面临两种潜在的严重风险:因抗凝作用过度导致严重失血引起的出血,或因停止抗凝后瓣膜血栓形成阻塞以及通畅性丧失所致的出血。本文报告一例简短病例。该老年男性患者主动脉位置有一个人工瓣膜,还患有两种恶性疾病:慢性淋巴细胞白血病以及近期发生的肺癌且已转移至双肺。患者发生了严重的胃肠道出血,导致血细胞比容突然下降(降至0.09),并因香豆素类药物作用过度(国际标准化比值>8)而出现外周循环衰竭。在紧急输血早期出现了急性左心室衰竭,因此通过新鲜冷冻血浆纠正凝血酶原时间(由于所需量较大)不可行。在几乎绝望的情况下,患者静脉注射了50微克/千克的诺其(重组活性因子VII)。国际标准化比值在30分钟内降至2.1;出血立即停止。随访期间既没有弥散性血管内凝血的证据(尽管患者年龄较大且有基础疾病),也没有瓣膜通畅性丧失或感染性心内膜炎的情况。这份简短报告可能会引起人们对重组活性因子VII在人工心脏瓣膜患者香豆素类药物诱导的严重出血事件中的潜在应用的关注。